CN113418330A - Liquid air energy storage system, combined cold accumulator and control method thereof - Google Patents
Liquid air energy storage system, combined cold accumulator and control method thereof Download PDFInfo
- Publication number
- CN113418330A CN113418330A CN202110594908.XA CN202110594908A CN113418330A CN 113418330 A CN113418330 A CN 113418330A CN 202110594908 A CN202110594908 A CN 202110594908A CN 113418330 A CN113418330 A CN 113418330A
- Authority
- CN
- China
- Prior art keywords
- cold
- tank
- control valve
- main pipe
- branch pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D3/00—Devices using other cold materials; Devices using cold-storage bodies
- F25D3/10—Devices using other cold materials; Devices using cold-storage bodies using liquefied gases, e.g. liquid air
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
- F28D20/0056—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using solid heat storage material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
- F28F27/02—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus for controlling the distribution of heat-exchange media between different channels
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Other Air-Conditioning Systems (AREA)
Abstract
The invention provides a liquid air energy storage system, a combined cold accumulator and a control method thereof. The combined regenerator comprises a first main pipe; a second main pipe; the system comprises at least two cold accumulation tanks, a first main pipe and a second main pipe, wherein the at least two cold accumulation tanks are connected in series through a first branch pipe, the tops of the at least two cold accumulation tanks are communicated with the first main pipe through a second branch pipe, and the bottoms of the at least two cold accumulation tanks are communicated with the second main pipe through a third branch pipe; the cold compensation tank is connected to the first main pipe and is connected to the upstream of one cold accumulation tank through a fourth branch pipe; and the normal temperature tank is connected to the first main pipe and the second main pipe and is connected to the downstream of the other cold storage tank through a fifth branch pipe. The cold supplementing tank and the normal temperature tank in the combined cold accumulator can provide space for the development of an inclined temperature layer, the outlet temperature of heat exchange fluid of the packed bed is always kept at the design temperature in the cold storage/release process, the cold storage tank for effective heat exchange of the open part is opened to replace the whole cold storage tank, the pumping power consumption of the heat exchange fluid can be reduced, and the system efficiency is improved.
Description
Technical Field
The invention relates to the field of cold accumulation equipment, in particular to a liquid air energy storage system, a combined cold accumulator and a control method thereof.
Background
The great increase of energy consumption is one of the major environmental hazards, the irreversible consequences of climate change promote the transformation of energy structures, and at present in the production of electricity fossil fuels still occupy one fourth of the total energy consumption, so that the development of renewable energy is imperative. However, renewable energy sources have unpredictable, unstable properties, pose certain challenges to the balance between power production and power demand, and one viable solution to overcome this problem is to perform energy storage.
The energy storage technology can realize energy supply and demand balance through peak shaving or load balancing. At present, large-scale energy storage technologies comprise pumped storage, compressed air energy storage and liquid air energy storage, and the pumped storage and compressed air energy storage technologies are greatly limited by environmental conditions, so that the liquid air energy storage technology is widely concerned. As a liquid air energy storage technology capable of realizing large-scale long-time energy storage, the liquid air energy storage system has the advantages of no geographic condition limitation, high energy storage density and the like, and the system energy storage efficiency still has a larger space for improvement.
The cold accumulation system is used as a core part in the whole process of liquid air energy storage, and the efficiency of the cold accumulation system directly determines the efficiency of the system. Therefore, it is particularly important to realize efficient cold accumulation of the regenerator.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a combined cold accumulator which can greatly reduce the pumping power consumption of heat exchange fluid, thereby improving the system efficiency.
In an embodiment of the first aspect of the present invention, a combined regenerator is provided, which includes:
a first main tube;
a second main pipe;
the heat storage tanks are connected in series through first branch pipes, the tops of the heat storage tanks are communicated with the first main pipe through second branch pipes, and the bottoms of the heat storage tanks are communicated with the second main pipe through third branch pipes;
the cold compensation tank is connected to the first main pipe and is connected to the upstream of one cold accumulation tank through a fourth branch pipe;
and the normal temperature tank is connected with the first main pipe and the second main pipe, and is connected with the other downstream of the cold storage tank through a fifth branch pipe.
According to the combined cold accumulator provided by the embodiment of the first aspect of the invention, the cold compensation tank and the normal temperature tank are respectively added at the upstream and downstream of the cold accumulation tank, because the thermocline inside the packed bed is continuously expanded along with the continuous accumulation of the cold storage/release process, the cold compensation tank and the normal temperature tank can effectively provide space for the development of the thermocline, and further ensure that the outlet temperature of the heat exchange fluid of the packed bed is always kept at the design temperature in the cold storage/release process, and the adverse effect of the dynamic characteristic of the packed bed in multi-cycle on the whole system can be effectively overcome by the above way. Moreover, as the combined cold accumulator adopts modularized regulation and control, and the cold accumulation tank with the opened part for effective heat exchange is opened to replace the whole cold accumulation tank, the pumping power consumption of the heat exchange fluid can be greatly reduced, and the system efficiency is further improved.
According to one embodiment of the invention, a first control valve is arranged on the first branch pipe, a second control valve is arranged on the second branch pipe, a third control valve is arranged on the third branch pipe, a fourth control valve is arranged on the fourth branch pipe, and a fifth control valve is arranged on the fifth branch pipe.
According to one embodiment of the invention, the bottom of the cold supplement tank is also provided with a sixth branch pipe, and a sixth control valve is arranged on the sixth branch pipe.
According to one embodiment of the present invention, a seventh control valve is provided between the cold recovery tank and the first main pipe, an eighth control valve is provided between the normal temperature tank and the first main pipe, and a ninth control valve is provided between the normal temperature tank and the second main pipe.
According to an embodiment of the present invention, a tenth control valve is connected to the first main pipe on a side of the eighth control valve away from the ambient temperature tank, and an eleventh control valve is connected to the second main pipe on a side of the second main pipe away from the ninth control valve.
According to one embodiment of the present invention, the cold storage tank includes a cold storage tank body and a solid phase cold storage medium filled inside the cold storage tank body.
According to one embodiment of the invention, the number of the cold-supplement tanks and/or the ambient temperature tanks is multiple, and the multiple cold-supplement tanks are connected in series with each other and/or the multiple ambient temperature tanks are connected in series with each other.
In a second aspect of the present invention, an embodiment of the invention provides a liquid air energy storage system, including the combined regenerator described above.
According to the liquid air energy storage system provided by the embodiment of the second aspect of the invention, by arranging the combined regenerator in the embodiment of the first aspect of the invention, the outlet temperature of the heat exchange fluid of the packed bed can be always kept at the design temperature in the cold storage/release process. Because combination formula regenerator adopts the modularization regulation and control, the cold storage tank of the effective heat transfer of open part is in order to replace whole opening simultaneously, can reduce heat transfer fluid's pumping consumption by a wide margin, and then can realize the promotion of liquid air energy storage system efficiency.
In a third aspect, an embodiment of the present invention provides a method for controlling a combined regenerator, including:
a primary cold accumulation step, wherein a heat exchange fluid is introduced into the cold accumulation tank positioned at the upstream of at least two cold accumulation tanks from the bottom of the cold accumulation tank, and the heat exchange fluid sequentially flows through the rest cold accumulation tanks;
and a cold accumulation step again, namely introducing the heat exchange fluid into the cold compensation tank, and enabling the heat exchange fluid to sequentially flow through the rest cold accumulation tanks.
According to an embodiment of the present invention, further comprising:
determining that the thermocline enters the normal-temperature tank in the cold accumulation process of the last time;
a first cold releasing step, wherein a heat exchange fluid is introduced into the normal temperature tank and the cold storage tank positioned at the downstream of the at least two cold storage tanks through an eighth control valve;
and a second cooling step, namely after the temperature of the normal-temperature tank reaches a preset temperature, sequentially introducing the heat exchange fluid into the cold storage tank and the low-temperature tank.
One or more technical solutions in the present invention have at least one of the following technical effects:
according to the combined cold accumulator provided by the embodiment of the first aspect of the invention, the cold compensation tank and the normal temperature tank are respectively added at the upstream and downstream of the cold accumulation tank, because the thermocline inside the packed bed is continuously expanded along with the continuous accumulation of the cold storage/release process, the cold compensation tank and the normal temperature tank can effectively provide space for the development of the thermocline, and further ensure that the outlet temperature of the heat exchange fluid of the packed bed is always kept at the design temperature in the cold storage/release process, and the adverse effect of the dynamic characteristic of the packed bed in multi-cycle on the whole system can be effectively overcome by the above way. Moreover, as the combined cold accumulator adopts modularized regulation and control, and the cold accumulation tank with the opened part for effective heat exchange is opened to replace the whole cold accumulation tank, the pumping power consumption of the heat exchange fluid can be greatly reduced, and the system efficiency is further improved.
According to the liquid air energy storage system provided by the embodiment of the second aspect of the invention, by arranging the combined regenerator in the embodiment of the first aspect of the invention, the outlet temperature of the heat exchange fluid of the packed bed can be always kept at the design temperature in the cold storage/release process. Because combination formula regenerator adopts the modularization regulation and control, the cold storage tank of the effective heat transfer of open part is in order to replace whole opening simultaneously, can reduce heat transfer fluid's pumping consumption by a wide margin, and then can realize the promotion of liquid air energy storage system efficiency.
Drawings
Fig. 1 is a schematic structural view of a combined regenerator according to an embodiment of the present invention.
Reference numerals:
100. a first main tube; 102. a second main pipe; 104. a cold storage tank; 106. a first branch pipe; 108. a second branch pipe; 110. a third branch pipe; 112. a cold supplement tank; 114. a fourth branch pipe; 116. a normal temperature tank; 118. a fifth branch pipe; 120. a first control valve; 122. a second control valve; 124. a third control valve; 126. a fourth control valve; 128. a fifth control valve; 130. a sixth branch pipe; 132. a sixth control valve; 134. a seventh control valve; 136. an eighth control valve; 138. a ninth control valve; 140. a tenth control valve; 142. an eleventh control valve.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. Specific meanings of the above terms in the embodiments of the present invention can be understood in specific cases by those of ordinary skill in the art.
In embodiments of the invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
As shown in fig. 1, an embodiment of the first aspect of the present invention provides a combined regenerator, including:
a first main tube 100;
a second main tube 102;
at least two cold storage tanks 104, wherein the at least two cold storage tanks 104 are connected in series through a first branch pipe 106, the tops of the at least two cold storage tanks 104 are communicated with the first main pipe 100 through a second branch pipe 108, and the bottoms of the at least two cold storage tanks 104 are communicated with the second main pipe 102 through a third branch pipe 110;
a cold makeup tank 112 connected to the first main pipe 100 and connected upstream of one of the cold accumulation tanks 104 through a fourth branch pipe 114;
the normal temperature tank 116 is connected to the first main pipe 100 and the second main pipe 102, and is connected downstream of the other cold storage tank 104 via a fifth branch pipe 118.
According to the combined cold accumulator provided by the embodiment of the first aspect of the invention, the cold compensation tank 112 and the normal temperature tank 116 are respectively added at the upstream and downstream of the cold accumulation tank 104, because the inclined temperature layer inside the packed bed is continuously expanded along with the continuous progress and the continuous accumulation of the times of the cold storage/release process, the cold compensation tank 112 and the normal temperature tank 116 can effectively provide space for the development of the inclined temperature layer, and further ensure that the outlet temperature of the heat exchange fluid of the packed bed is always kept at the design temperature in the cold storage/release process, and the adverse effect of the dynamic characteristic of the packed bed in multiple cycles on the whole system can be effectively overcome in the above manner. Moreover, as the combined cold accumulator adopts modularized regulation and control, and the cold accumulation tank 104 which is opened for partial effective heat exchange is completely opened, the pumping power consumption of heat exchange fluid can be greatly reduced, and the system efficiency is further improved.
Specifically, referring to fig. 1, the combined regenerator provided in the first embodiment of the present invention mainly includes a first main pipe 100, a second main pipe 102, at least two cold accumulation tanks 104, a cold supplement tank 112, and a normal temperature tank 116.
The first main pipe 100 and the second main pipe 102 are used for communicating at least two cold storage tanks 104 with the cold supplement tank 112 and the normal temperature tank 116. In the present embodiment, the first main pipe 100 is connected above the at least two cold storage tanks 104, that is, the tops of the at least two cold storage tanks 104 communicate with the first main pipe 100 through the second branch pipe 108. The second main pipe 102 is connected below the at least two cold storage tanks 104, that is, the bottoms of the at least two cold storage tanks 104 communicate with the second main pipe 102 through the third branch pipe 110.
In addition, at least two cold storage tanks 104 are connected in series through the first branch pipe 106, and it should be noted that, in the embodiment of the present invention, two cold storage tanks 104 are taken as an example. The top of the cold storage tank 104 located upstream is connected to the bottom of the cold storage tank 104 located downstream through a first branch pipe 106. As shown in fig. 1, when the cold storage tanks 104 are three, the top of the first cold storage tank 104 located on the left side is connected to the bottom of the second cold storage tank 104 located in the middle by the first branch pipe 106, and the top of the second cold storage tank 104 located in the middle is connected to the bottom of the third cold storage tank 104 located on the right side by the first branch pipe 106.
Thus, when cold accumulation is performed, the heat exchange fluid can enter the first cold accumulation tank 104 from the bottom of the first cold accumulation tank 104, flow out from the top of the first cold accumulation tank 104, enter the second cold accumulation tank 104 from the bottom of the second cold accumulation tank 104, flow out from the top of the second cold accumulation tank 104, and finally enter the third cold accumulation tank 104 from the bottom of the third cold accumulation tank 104.
When the cooling is released, the heat exchange fluid can enter the third cold storage tank 104 from the top of the third cold storage tank 104, flow out from the bottom of the third cold storage tank 104, enter the second cold storage tank 104 from the top of the second cold storage tank 104, flow out from the bottom of the second cold storage tank 104, and finally enter the third cold storage tank 104 from the top of the third cold storage tank 104.
In the embodiment of the present invention, referring to fig. 1, a cold supplement tank 112 is further provided upstream of the first cold storage tank 104, and a normal temperature tank 116 is further provided downstream of the third cold storage tank 104. That is, the cold supplement tank 112 is connected upstream of the first heat storage tank 104 via a fourth branch pipe 114, and the normal temperature tank 116 is connected downstream of the third heat storage tank 104 via a fifth branch pipe 118. Meanwhile, the cold supplement tank 112 is also connected to the first main pipe 100, and the normal temperature tank 116 is also connected to the first main pipe 100 and the second main pipe 102.
Referring to fig. 1, according to one embodiment of the present invention, a first control valve 120 is disposed on the first branch 106, a second control valve 122 is disposed on the second branch 108, a third control valve 124 is disposed on the third branch 110, a fourth control valve 126 is disposed on the fourth branch 114, and a fifth control valve 128 is disposed on the fifth branch 118.
By providing the first control valve 120 in the first branch pipe 106, the second control valve 122 in the second branch pipe 108, the third control valve 124 in the third branch pipe 110, the fourth control valve 126 in the fourth branch pipe 114, and the fifth control valve 128 in the fifth branch pipe 118, the flow direction of the heat exchange fluid can be controlled by opening and closing different control valves.
Specifically, the on/off of the two adjacent cold storage tanks 104 can be controlled by controlling the first control valve 120; the on/off between the cold storage tank 104 and the first main pipe 100 can be controlled by controlling the second control valve 122; the on/off between the cold storage tank 104 and the second main pipe 102 can be controlled by controlling the third control valve 124; the on-off between the cold compensation tank 112 and the cold accumulation tank 104 can be controlled by controlling the fourth control valve 126; the fifth control valve 128 is controlled to control the opening/closing of the cold storage tank 104 and the normal temperature tank 116.
Thus, the cold accumulation tank 104 which can effectively exchange heat partially can be opened to replace the whole system by controlling different control valves, so that the pumping power consumption of the heat exchange fluid can be greatly reduced, and the efficiency of the system can be improved.
According to an embodiment of the present invention, the bottom of the cold-supplement tank 112 is further provided with a sixth branch pipe 130, and the sixth branch pipe 130 is provided with a sixth control valve 132.
Through setting up sixth branch pipe 130 in the bottom of cold-supplement tank 112 to set up sixth control valve 132 on sixth branch pipe 130, make in cold-storage process again, can open sixth control valve 132 to make heat transfer fluid flow through sixth control valve 132 get into cold-supplement tank 112, so that can provide the space for the development of thermocline in cold-supplement tank 112, flow through cold-supplement tank 112 after and flow into cold-storage tank 104.
According to an embodiment of the present invention, a seventh control valve 134 is disposed between the cold supplement tank 112 and the first main pipe 100, an eighth control valve 136 is disposed between the normal temperature tank 116 and the first main pipe 100, and a ninth control valve 138 is disposed between the normal temperature tank 116 and the second main pipe 102.
By providing the seventh control valve 134 between the cold supplement tank 112 and the first main pipe 100, the eighth control valve 136 between the normal temperature tank 116 and the first main pipe 100, and the ninth control valve 138 between the normal temperature tank 116 and the second main pipe 102, the opening and closing of the cold supplement tank 112, the space between the normal temperature tank 116 and the first main pipe 100, and the space between the normal temperature tank 116 and the second main pipe 102 can be controlled. For example, when the eighth control valve 136 is opened, the heat exchange fluid can pass through the eighth control valve 136 into the ambient tank 116 during the cooling process.
According to an embodiment of the present invention, a tenth control valve 140 is connected to the first main pipe 100 on a side of the eighth control valve 136 facing away from the ambient tank 116, and an eleventh control valve 142 is connected to the second main pipe 102 on a side facing away from the ninth control valve 138.
For example, by providing the tenth control valve 140 on the side of the first main pipe 100 away from the ambient tank 116 and the eighth control valve 136, the tenth control valve 140 may be opened during the cooling process, so that the heat exchange fluid can flow through the tenth control valve 140 into the ambient tank 116. When cold is first accumulated, the eleventh control valve 142 may be opened and the heat exchange fluid may flow through the eleventh control valve 142 into the first cold accumulation tank 104. When cold is again being stored, the eleventh control valve 142 may be opened and the heat transfer fluid may flow through the eleventh control valve 142 into the cold-storage tank 112 and then through the cold-storage tank 112 into the first cold-storage tank 104.
According to one embodiment of the present invention, the cold storage tank 104 includes a cold storage tank 104 body and a solid phase cold storage medium filled inside the cold storage tank 104 body.
Specifically, each cold storage tank 104 includes a cold storage tank 104 body and a solid phase cold storage medium filled in the cold storage tank 104 body. The solid phase cold accumulation medium is a fixed particle material or a porous material, and one material can be filled in the cold accumulation tank 104 body to form the solid phase cold accumulation medium, or a plurality of mixed materials can be filled in the cold accumulation tank to form the solid phase cold accumulation medium. Wherein, the filling mode of the solid phase cold accumulation medium in the cold accumulation tank 104 body adopts the layered accumulation or the mixed accumulation.
Specifically, the fluid exchanging heat with the combined regenerator may be a liquid or a gas, or a mixture of a liquid and a gas. During heat exchange, the heat exchange fluid and the solid phase cold accumulation medium can directly contact for heat exchange, and can also indirectly exchange heat through intermediate gas or liquid.
According to an embodiment of the present invention, there are a plurality of the cold supplement tanks 112 and/or the ambient temperature tanks 116, and a plurality of the cold supplement tanks 112 are connected in series with each other, and/or a plurality of the ambient temperature tanks 116 are connected in series with each other.
In other words, in the embodiment of the present invention, there may be a plurality of the cold compensation tanks 112, and the plurality of cold compensation tanks 112 are connected in series with each other. Similarly, a plurality of ambient temperature tanks 116 may be provided, and a plurality of ambient temperature tanks 116 may be connected in series with each other.
In a second aspect of the present invention, an embodiment of the invention provides a liquid air energy storage system, including the combined regenerator described above.
According to the liquid air energy storage system provided by the embodiment of the second aspect of the invention, by arranging the combined regenerator in the embodiment of the first aspect of the invention, the outlet temperature of the heat exchange fluid of the packed bed can be always kept at the design temperature in the cold storage/release process. Because the modular regulation is adopted in the combined cold accumulator, the cold accumulation tank 104 which is opened for partial effective heat exchange is opened to replace the whole cold accumulation tank, the pumping power consumption of the heat exchange fluid can be greatly reduced, and the efficiency of the liquid air energy storage system can be improved.
In a third aspect, an embodiment of the present invention provides a method for controlling a combined regenerator, including:
a primary cold accumulation step, in which a heat exchange fluid is introduced into the cold accumulation tank 104 positioned at the upstream of the at least two cold accumulation tanks 104 from the bottom of the cold accumulation tank 104, and the heat exchange fluid sequentially flows through the remaining cold accumulation tanks 104;
the cold storage step again, the heat exchange fluid is passed into the cold compensation tank 112 and the heat exchange fluid is sequentially passed through the remaining cold storage tanks 104.
According to the control method of the combined cold accumulator provided by the embodiment of the third aspect of the invention, the cold compensation tank 112 and the normal temperature tank 116 are respectively added at the upstream and downstream of the cold accumulation tank 104, because the inclined temperature layer inside the packed bed is continuously expanded along with the continuous running and the continuous accumulation of the times of the cold storage/release process, the cold compensation tank 112 and the normal temperature tank 116 can effectively provide space for the development of the inclined temperature layer, and further ensure that the outlet temperature of the heat exchange fluid of the packed bed is always kept at the design temperature in the cold storage/release process, and the above way can effectively overcome the adverse effect of the dynamic characteristic of the packed bed in multi-cycle on the whole system.
Specifically, in the primary cold storage step, the heat exchange fluid directly enters the first cold storage tank 104 from the bottom, that is, in this step, the eleventh control valve 142, the third control valve 124 between the first cold storage tank 104 and the second main pipe 102, and the second control valve 122 between the first cold storage tank 104 and the first main pipe 100 are opened, and the remaining control valves are closed. As the heat exchange in the first heat storage tank 104 is continued, when the outlet temperature thereof starts to decrease, the first control valve 120 between the first heat storage tank 104 and the second control valve 122 between the second heat storage tank 104 and the first main pipe 100 are opened, the second control valve 122 between the first heat storage tank 104 and the first main pipe 100 is closed, and the heat exchange fluid passes through the first heat storage tank 104 and the second heat storage tank 104 in sequence.
When the outlet temperature of the second heat storage tank 104 starts to decrease, the first control valve 120 between the second heat storage tank 104 and the third heat storage tank 104 and the second control valve 122 between the third heat storage tank 104 and the first main pipe 100 are opened, the second control valve 122 between the second heat storage tank 104 and the first main pipe 100 is closed, and so on.
Meanwhile, when the outlet temperature of the first cold storage tank 104 drops to the design low temperature, the third control valve 124 between the first cold storage tank 104 and the second main pipe 102 is closed, and the heat exchange fluid directly enters the second cold storage tank 104 through the third control valve 124 between the second cold storage tank 104 and the second main pipe 102, similarly, when the outlet temperature of the second cold storage tank 104 drops to the design low temperature, the second control valve 122 between the second cold storage tank 104 and the first main pipe 100 is closed, and so on until the first cold storage process is completed.
In the secondary cold accumulation step, that is, in the second and subsequent cold accumulation processes, unlike the primary cold accumulation step, the heat exchange fluid firstly enters the cold compensation tank 112 and the first cold accumulation tank 104 through the sixth control valve 132, because the temperature gradient layer of the packed bed develops into the cold compensation tank 112 in the adjacent last cold release process, that is, the eleventh control valve 142, the sixth control valve 132, the fourth control valve 126, and the second control valve 122 between the first cold accumulation tank 104 and the first main pipe 100 are opened, and the other control valves are closed, when the first cold compensation tank 112 is fully cooled to the design low temperature, the sixth control valve 132 and the fourth control valve 126 are closed, the third control valve 124 between the first cold accumulation tank 104 and the second main pipe 102 is opened, and the heat exchange fluid directly enters the first cold accumulation tank 104, and the rest operations are the same as those in the primary cold accumulation step.
According to an embodiment of the present invention, further comprising:
determining that the thermocline enters the normal temperature tank 116 in the last adjacent cold accumulation process, and in the first cold release step, introducing a heat exchange fluid into the normal temperature tank 116 and the cold accumulation tank 104 positioned at the downstream of the at least two cold accumulation tanks 104 through an eighth control valve 136;
in the second cooling step, after the temperature of the normal temperature tank 116 reaches the preset temperature, the heat exchange fluid is sequentially introduced into the cold storage tank 104 and the cold compensation tank 112.
Specifically, in the first cooling release step, the heat exchange fluid directly enters the ambient temperature tank 116 and the third storage tank 104 from the top via the eighth control valve 136, that is, the tenth control valve 140, the eighth control valve 136, the fifth control valve 128, and the third control valve 124 between the third storage tank 104 and the second main pipe 102 are opened, and the remaining control valves are closed. When the normal temperature tank 116 is at the design normal temperature, the eighth control valve 136 and the fifth control valve 128 are closed, the second control valve 122 between the third cold storage tank 104 and the first main pipe 100 is opened, and the normal temperature gas directly enters the third cold storage tank 104.
In the second cooling step, as the heat exchange in the third cold storage tank 104 is continued, when the outlet temperature thereof starts to rise, the first control valve 120 between the second cold storage tank 104 and the third control valve 124 between the second cold storage tank 104 and the second main pipe 102 are opened, the third control valve 124 between the third cold storage tank 104 and the second main pipe 102 is closed, and the heat exchange fluid passes through the third cold storage tank 104 and the second cold storage tank 104 in this order. When the second accumulator tank 104 outlet temperature starts to rise, the third control valve 124 between the first accumulator tank 104 and the second accumulator tank 104 and the third control valve 124 between the first accumulator tank 104 and the second main pipe 102 are opened, the third control valve 124 between the second accumulator tank 104 and the second main pipe 102 is closed, and so on. Meanwhile, when the outlet temperature of the third cold storage tank 104 rises to the design normal temperature, the second control valve 122 between the third cold storage tank 104 and the first main pipe 100 is closed, and the heat exchange fluid directly enters the second cold storage tank 104 through the second control valve 122 between the second cold storage tank 104 and the first main pipe 100, similarly, when the outlet temperature of the second cold storage tank 104 rises to the design normal temperature, the second control valve 122 between the second pipe and the first main pipe 100 is closed, and so on until the cooling process is completed.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A combined regenerator, comprising:
a first main tube (100);
a second main tube (102);
at least two cold storage tanks (104), wherein the at least two cold storage tanks (104) are connected in series through a first branch pipe (106), the tops of the at least two cold storage tanks (104) are communicated with the first main pipe (100) through a second branch pipe (108), and the bottoms of the at least two cold storage tanks (104) are communicated with the second main pipe (102) through a third branch pipe (110);
a cold makeup tank (112) connected to the first main pipe (100) and connected upstream of one of the cold accumulation tanks (104) through a fourth branch pipe (114);
and a normal temperature tank (116) connected to the first main pipe (100) and the second main pipe (102), and connected downstream of the other cold storage tank (104) via a fifth branch pipe (118).
2. The combined regenerator according to claim 1, wherein the first branch pipe (106) is provided with a first control valve (120), the second branch pipe (108) is provided with a second control valve (122), the third branch pipe (110) is provided with a third control valve (124), the fourth branch pipe (114) is provided with a fourth control valve (126), and the fifth branch pipe (118) is provided with a fifth control valve (128).
3. The combined regenerator according to claim 1, wherein the bottom of the cold-supplement tank (112) is further provided with a sixth branch pipe (130), and a sixth control valve (132) is provided on the sixth branch pipe (130).
4. The combined regenerator of claim 1, wherein a seventh control valve (134) is disposed between the cold recovery tank (112) and the first main pipe (100), an eighth control valve (136) is disposed between the normal temperature tank (116) and the first main pipe (100), and a ninth control valve (138) is disposed between the normal temperature tank (116) and the second main pipe (102).
5. The combined regenerator of claim 4, wherein a tenth control valve (140) is connected to the first main pipe (100) on the side facing away from the ambient tank (116) of the eighth control valve (136), and wherein an eleventh control valve (142) is connected to the second main pipe (102) on the side facing away from the ninth control valve (138).
6. The combined regenerator according to claim 5, characterized in that the cold storage tank (104) comprises a cold storage tank (104) body and a solid phase cold storage medium filled inside the cold storage tank (104) body.
7. The combined regenerator according to claim 5, wherein the plurality of the cold-supplement tanks (112) and/or the ambient-temperature tank (116) are provided, and a plurality of the cold-supplement tanks (112) are connected in series with each other, and/or a plurality of the ambient-temperature tanks (116) are connected in series with each other.
8. A liquid air energy storage system comprising a combined regenerator as claimed in any of claims 1 to 6.
9. A method of controlling a combined regenerator as claimed in any of claims 1 to 7, comprising:
a primary cold accumulation step, wherein a heat exchange fluid is introduced into the cold accumulation tank (104) positioned at the upstream of the at least two cold accumulation tanks (104) from the bottom of the cold accumulation tank (104), and the heat exchange fluid sequentially flows through the rest cold accumulation tanks (104);
and a cold accumulation step, namely introducing the heat exchange fluid into the cold compensation tank (112), and enabling the heat exchange fluid to sequentially flow through the rest cold accumulation tanks (104).
10. The method for controlling a combined regenerator as claimed in claim 9, further comprising:
determining that the thermocline enters the normal temperature tank (116) in the cold accumulation process of the last time;
a first cooling release step, wherein a heat exchange fluid is introduced into the normal temperature tank (116) and the cold storage tank (104) positioned at the downstream of the at least two cold storage tanks (104) through an eighth control valve (136);
and a second cooling step, wherein after the temperature of the normal temperature tank (116) reaches a preset temperature, the heat exchange fluid is sequentially introduced into the cold storage tank (104) and the cold supplement tank (112).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110594908.XA CN113418330A (en) | 2021-05-28 | 2021-05-28 | Liquid air energy storage system, combined cold accumulator and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110594908.XA CN113418330A (en) | 2021-05-28 | 2021-05-28 | Liquid air energy storage system, combined cold accumulator and control method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113418330A true CN113418330A (en) | 2021-09-21 |
Family
ID=77713206
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110594908.XA Pending CN113418330A (en) | 2021-05-28 | 2021-05-28 | Liquid air energy storage system, combined cold accumulator and control method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113418330A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105509528A (en) * | 2016-02-03 | 2016-04-20 | 中国科学院理化技术研究所 | Multistage gradient phase change cold storage device |
| CN105697066A (en) * | 2016-02-03 | 2016-06-22 | 中国科学院理化技术研究所 | Low-temperature liquid air energy storage system |
| CN107975951A (en) * | 2017-10-19 | 2018-05-01 | 全球能源互联网欧洲研究院 | A kind of heat-storing device and heat reservoir |
| CN110186303A (en) * | 2019-05-22 | 2019-08-30 | 中国科学院理化技术研究所 | Accumulation of heat/cooler |
| WO2020021014A1 (en) * | 2018-07-26 | 2020-01-30 | ETH Zürich | Thermocline control method |
| WO2020204933A1 (en) * | 2019-04-04 | 2020-10-08 | Terrafore Technologies, Llc | Thermocline thermal energy storage in multiple tanks |
| CN111829246A (en) * | 2020-06-01 | 2020-10-27 | 全球能源互联网研究院有限公司 | Low-temperature energy storage system and control method thereof |
| CN112129018A (en) * | 2020-10-19 | 2020-12-25 | 中国科学院理化技术研究所 | Combined cold accumulator and liquid air energy storage system |
-
2021
- 2021-05-28 CN CN202110594908.XA patent/CN113418330A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105509528A (en) * | 2016-02-03 | 2016-04-20 | 中国科学院理化技术研究所 | Multistage gradient phase change cold storage device |
| CN105697066A (en) * | 2016-02-03 | 2016-06-22 | 中国科学院理化技术研究所 | Low-temperature liquid air energy storage system |
| CN107975951A (en) * | 2017-10-19 | 2018-05-01 | 全球能源互联网欧洲研究院 | A kind of heat-storing device and heat reservoir |
| WO2020021014A1 (en) * | 2018-07-26 | 2020-01-30 | ETH Zürich | Thermocline control method |
| WO2020204933A1 (en) * | 2019-04-04 | 2020-10-08 | Terrafore Technologies, Llc | Thermocline thermal energy storage in multiple tanks |
| CN110186303A (en) * | 2019-05-22 | 2019-08-30 | 中国科学院理化技术研究所 | Accumulation of heat/cooler |
| CN111829246A (en) * | 2020-06-01 | 2020-10-27 | 全球能源互联网研究院有限公司 | Low-temperature energy storage system and control method thereof |
| CN112129018A (en) * | 2020-10-19 | 2020-12-25 | 中国科学院理化技术研究所 | Combined cold accumulator and liquid air energy storage system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103292486B (en) | Single-tank/double-tank combined heat accumulation system for solar thermal power generation, and heat accumulation method of single-tank/double-tank combined heat accumulation system | |
| CN112129018A (en) | Combined cold accumulator and liquid air energy storage system | |
| CN106437874A (en) | Novel liquid air energy storage system using phase change energy storage | |
| CN107449026A (en) | High-efficiency solar heating method and system based on stagewise heat accumulation heat release | |
| CN109405611B (en) | Composite heat storage system with two-stage phase change heat storage device and steam storage tank | |
| CN114087904A (en) | Electric hydrogen production waste heat utilization device and method | |
| US20140150485A1 (en) | Storage Unit for a Drive System in a Vehicle | |
| CN113865262A (en) | Supercooled liquid methane self-circulation online preparation system and method based on pressurization and temperature control | |
| CN115752058A (en) | Efficient mixed heat storage and energy conversion system with coupled molten salt and phase-change heat storage material | |
| CN113418330A (en) | Liquid air energy storage system, combined cold accumulator and control method thereof | |
| CN202598964U (en) | A modular air-cooling cold and hot water unit | |
| CN213542913U (en) | Combined cold accumulator and liquid air energy storage system | |
| CN108561294A (en) | A kind of control method of the large-scale compression air energy storage systems of the double states of gas/liquid | |
| CN114754290B (en) | Metal hydride hydrogen storage tank based on phase change heat storage and solid-gas coupling hydrogen storage system | |
| CN113958440B (en) | Water-gas double-working-medium energy storage method and system | |
| CN217560432U (en) | Movable tank type high-pressure high-temperature hot water heat storage and release system | |
| CN110657697A (en) | Valley electricity energy storage device and using method thereof | |
| CN114087522A (en) | Zero-loss liquid hydrogen storage and transportation and hydrogenation system, equipment and transport vehicle | |
| CN205223137U (en) | Make coal seam gas hydrate's device | |
| CN114963830A (en) | Heat storage system for transferring heat by using molten salt and operation method | |
| CN212930171U (en) | Heating and heat supply dual-supply system for storing solar energy by utilizing ice-water mixture | |
| CN105509527B (en) | A kind of mixing cold accumulation system based on liquid Yu solid-liquid working medium | |
| CN212720080U (en) | Air conditioner circulating phase-change refrigerating system and air conditioner | |
| CN210463702U (en) | Energy station based on LNG gasification heat transfer system | |
| CN102759161A (en) | Solar radiation air-conditioner |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210921 |